mark Posted October 11, 2008 Share Posted October 11, 2008 This caliper is off of my track car. It's seen about 15 days on track. It has leaked once from a bad seal. All seals were replaced, pistons and calipers cleaned and new rotors and pads were put back on the car. At that time there was just a slight bit of anodization worn away. The machining marks were still visible in the cyclinder bores. That was about 4 or 5 track days ago. All poston bores are identical in the direction of the wear and they all look like this. It leaks. The easy fix is to buy a new caliper but I don't want the new one to end up like this one. Any thoughts guys? wilwood caliper Links to full size photos http://album.hybridz.org/data/500/medium/DSC001581.JPG http://album.hybridz.org/data/500/DSC001591.JPG Quote Link to comment Share on other sites More sharing options...
jt1 Posted October 11, 2008 Share Posted October 11, 2008 That is a classic symptom of your car being too fast. If you will slow down so I can keep up it won't happen. When I get home and sober up maybe I can offer an intelligent comment. At the moment, this is about it. jt Quote Link to comment Share on other sites More sharing options...
mark Posted October 11, 2008 Author Share Posted October 11, 2008 That is a classic symptom of your car being too fast. If you will slow down so I can keep up it won't happen. When I get home and sober up maybe I can offer an intelligent comment. At the moment, this is about it. jt Enjoy! I'll look forward to a sober analysis. Quote Link to comment Share on other sites More sharing options...
Clifton Posted October 12, 2008 Share Posted October 12, 2008 Wow. Are the bores all the same ID and pistons the same OD? Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted October 12, 2008 Share Posted October 12, 2008 Both calipers or just one side? If it's only one side, I am going to guess a possible mis-alignment of the caliper to the rotor surface causing the pistons to cock to one side under pressure. Chack that the caliper is exactly perpendicular to the axle shaft. Measure the thickness of the pads front to back to see if there is any "slope" in them. http://www.wilwood.com/Products/001-Calipers/calipertech.asp Quote Link to comment Share on other sites More sharing options...
mark Posted October 12, 2008 Author Share Posted October 12, 2008 Wow. Are the bores all the same ID and pistons the same OD? These are the pistons that came in the calipers. I have replaced the seals before. All are 1.75 pistons. Quote Link to comment Share on other sites More sharing options...
mark Posted October 12, 2008 Author Share Posted October 12, 2008 Both calipers or just one side? If it's only one side, I am going to guess a possible mis-alignment of the caliper to the rotor surface causing the pistons to cock to one side under pressure. Chack that the caliper is exactly perpendicular to the axle shaft. Measure the thickness of the pads front to back to see if there is any "slope" in them. http://www.wilwood.com/Products/001-Calipers/calipertech.asp I have not taken apart the other side yet. I just measured the caliper face to the rotor and there may be 2 or 3 thousands differerents between the front and rear. There is a bit of taper on the pads but nothing excessive. Quote Link to comment Share on other sites More sharing options...
mark Posted October 12, 2008 Author Share Posted October 12, 2008 jmortensen PMed me and his theory is caliper flex. I think that would account for the wear pattern in the bores. If it was a problem with alignment, I think the wear in the bores on the inside half of the caliper would be reveresed or a mirror image of the wear in the bores on the outer half of the caliper. Does that make any sense? Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted October 12, 2008 Share Posted October 12, 2008 Yup makes sense. Crooked caliper would be mirrored diagonally. Maybe you need grabbier pads or bigger calipers. Quote Link to comment Share on other sites More sharing options...
mark Posted October 12, 2008 Author Share Posted October 12, 2008 Yup makes sense. Crooked caliper would be mirrored diagonally. Maybe you need grabbier pads or bigger calipers. I've sent these pics to willwood and Dave at arizona Z. It will be interesting to see what they say. I'm sure the answer will involve more $$$. Quote Link to comment Share on other sites More sharing options...
Mikelly Posted October 12, 2008 Share Posted October 12, 2008 I agree with Jon. Mark, I think you might be better suited with a stronger caliper. How was pad wear and is this with a solid or floating rotor? I think your rotors were solid 2piece, and you may want to go to a bobbins setup... Mike Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted October 12, 2008 Share Posted October 12, 2008 I've read so many posts with issues regarding the Wildwood (AZZcar brake setup) ... are these even worth it or should I be looking elsewhere for a better brake package? Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted October 12, 2008 Share Posted October 12, 2008 I've read so many posts with issues regarding the Wildwood (AZZcar brake setup) ... are these even worth it or should I be looking elsewhere for a better brake package? Opinions will vary. Probably best to start a new thread to generally discuss the AZC brakes instead of hanging it on this thread. Quote Link to comment Share on other sites More sharing options...
mark Posted October 12, 2008 Author Share Posted October 12, 2008 I've read so many posts with issues regarding the Wildwood (AZZcar brake setup) ... are these even worth it or should I be looking elsewhere for a better brake package? I really don't think this is a problem with Dave's stuff. I'll post any info I get from Dave or wilwood. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted October 12, 2008 Share Posted October 12, 2008 What calipers are these anyway? Quote Link to comment Share on other sites More sharing options...
mark Posted October 12, 2008 Author Share Posted October 12, 2008 What calipers are these anyway? Wilwood forged billet superlites http://www.wilwood.com/Products/001-Calipers/012-FSL/index.asp Quote Link to comment Share on other sites More sharing options...
JMortensen Posted October 12, 2008 Share Posted October 12, 2008 Hmm... doesn't bode well for my Superlite II's. Quote Link to comment Share on other sites More sharing options...
mark Posted October 12, 2008 Author Share Posted October 12, 2008 I agree with Jon. Mark, I think you might be better suited with a stronger caliper. How was pad wear and is this with a solid or floating rotor? I think your rotors were solid 2piece, and you may want to go to a bobbins setup... Mike It's a two piece solid set up. Arizona Z stuff. I wonder if Dave's hat could be made to work with something like this? It's Brembo hardware for there floating rotor setup. Quote Link to comment Share on other sites More sharing options...
Clifton Posted October 12, 2008 Share Posted October 12, 2008 I've read so many posts with issues regarding the Wildwood (AZZcar brake setup) ... are these even worth it or should I be looking elsewhere for a better brake package? I run the old non bridged super lights on my track car and never had a problem and talk to Dave quite a bit and have never heard of it. My street car doesn't get the same use so it would be hard to compare. Quote Link to comment Share on other sites More sharing options...
Mikelly Posted October 12, 2008 Share Posted October 12, 2008 I think it's important to note here that Mark isn't your regular "student" HPDE driver... Mark, you're turning 2:10s (and probably faster) at VIR, and once you get beyond a certain level in performance, you're going to start seeing these anomalys. I think two things are contributing to it, as I've had time to think about it without an adult beverage infront of me... The solid rotor/ solid caliper mount is part of the issue (at your level of driving performance). You either need to get to a floating rotor, a floating caliper, or a stronger "monoblock" caliper like the Brembos we're using on my "other" car... I'd personally recommend getting incontact with Coleman racing. They can make you a floating hat/rotor design in any size and rotor configuration you want. That's what I'm using on the black car and I have 19 days total on those front rotors. Mike Quote Link to comment Share on other sites More sharing options...
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